A MUST when you visit the beautiful Vienna for the first time. Starts and ends at the same spot. Tickets and passes are sold at the same spot before a ride. Yellow trams are probably privately owned. Multilingual audio on headphones. The government owned red trams also follow the same route but does not have a audio guide. Passes by architecturally and historically important buildings, gardens and statues. Areas and buildings can be marked for a later visit. Areas of interest must be explored on foot too.
Vienna has a very nice, simple to understand public transport system.